Match Column I with Column II
Column I
Column II
P) Reversible isothermal expansion of an ideal gas
i) Δ S_sys = Δ S_surr = Δ S_total = 0
Q) Reversible adiabatic expansion of an ideal gas
ii) Δ H = Δ U = Δ S_total = 0
R) Adiabatic free expansion
iii) Δ S_total > 0

iv) q = 0

Question

Match Column I with Column II

Column I	Column II
P) Reversible isothermal expansion of an ideal gas	i) Δ S_sys = Δ S_surr = Δ S_total = 0
Q) Reversible adiabatic expansion of an ideal gas	ii) Δ H = Δ U = Δ S_total = 0
R) Adiabatic free expansion	iii) Δ S_total > 0
	iv) q = 0

TestHub · Accepted Answer

(P) For an ideal gas at constant temperature Δ U = Δ H = 0, and a reversible process has Δ S total = 0 — ii (heat flows, so not iv). (Q) A reversible adiabatic process has q = 0 and is isentropic: Δ S sys = Δ S surr = Δ S total = 0 — i,iv. (R) Expansion into a vacuum does no work and is adiabatic, q = 0; being irreversible it creates entropy, Δ S total > 0 — iii,iv.

Chemistry - Thermodynamics - II Question with Solution | TestHub

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